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【单选题】
药物的半数致死量是指A.
抗生素杀死一半病原菌的剂量
B.
引起半数实验动物严重毒性反应的剂量
C.
引起半数实验动物死亡的剂量
D.
致死量的一半
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【单选题】下列哪项不属于以加入表示同意承受条约约束的情况？（ ）
A.
条约本身规定可以加入
B.
条约无规定，但受到缔约国之一邀请即可加入
C.
条约无规定，经谈判国协议确定某些国家可以加入，则这些国家可加入
D.
全体当事国嗣后协议，某些国家可以用加入表示这种同意
【单选题】Usually there is a blackboard on the front wall in the classroom, _________there is a slogan.
A.
above which
B.
in that
C.
on which
D.
from that
【单选题】The slogan _________to remind the candidate and the staff ________the campaign focused on the nation's slow-moving economy.
A.
meant ... of keeping
B.
was meaning ... to keep
C.
was meant ... to keep
D.
had meant ... with keeping
【简答题】What is a slogan?
【简答题】A．spending B．provisions C．survey D．slogan
【单选题】听力原文： You've probably heard the slogan 'save the whales'. Do you know why the slogan began? It started as protest from people who want to ban whale hunting. Some types of whales are among the hundreds...
A.
They think whales are their friends.
B.
They believe whales can save humans.
C.
They wanted to ban whale-hunting.
D.
They enjoy watching whales in an aquarium.
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